CVE-2026-31409 (GCVE-0-2026-31409)
Vulnerability from cvelistv5
Published
2026-04-06 07:38
Modified
2026-04-13 06:08
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: unset conn->binding on failed binding request When a multichannel SMB2_SESSION_SETUP request with SMB2_SESSION_REQ_FLAG_BINDING fails ksmbd sets conn->binding = true but never clears it on the error path. This leaves the connection in a binding state where all subsequent ksmbd_session_lookup_all() calls fall back to the global sessions table. This fix it by clearing conn->binding = false in the error path.
References
Impacted products
Vendor Product Version
Linux Linux Version: f5a544e3bab78142207e0242d22442db85ba1eff
Version: f5a544e3bab78142207e0242d22442db85ba1eff
Version: f5a544e3bab78142207e0242d22442db85ba1eff
Version: f5a544e3bab78142207e0242d22442db85ba1eff
Version: f5a544e3bab78142207e0242d22442db85ba1eff
Version: f5a544e3bab78142207e0242d22442db85ba1eff
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{
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      "cpeApplicability": [
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          "nodes": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: unset conn-\u003ebinding on failed binding request\n\nWhen a multichannel SMB2_SESSION_SETUP request with\nSMB2_SESSION_REQ_FLAG_BINDING fails ksmbd sets conn-\u003ebinding = true\nbut never clears it on the error path. This leaves the connection in\na binding state where all subsequent ksmbd_session_lookup_all() calls\nfall back to the global sessions table. This fix it by clearing\nconn-\u003ebinding = false in the error path."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-13T06:08:37.718Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/d073870dab8f6dadced81d13d273ff0b21cb7f4e"
        },
        {
          "url": "https://git.kernel.org/stable/c/6ebef4a220a1ebe345de899ebb9ae394206fe921"
        },
        {
          "url": "https://git.kernel.org/stable/c/89afe5e2dbea6e9d8e5f11324149d06fa3a4efca"
        },
        {
          "url": "https://git.kernel.org/stable/c/9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772"
        },
        {
          "url": "https://git.kernel.org/stable/c/6260fc85ed1298a71d24a75d01f8b2e56d489a60"
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        {
          "url": "https://git.kernel.org/stable/c/282343cf8a4a5a3603b1cb0e17a7083e4a593b03"
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      ],
      "title": "ksmbd: unset conn-\u003ebinding on failed binding request",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31409",
    "datePublished": "2026-04-06T07:38:21.223Z",
    "dateReserved": "2026-03-09T15:48:24.087Z",
    "dateUpdated": "2026-04-13T06:08:37.718Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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